What is CloudLinux OS?

CloudLinux OS is the leading platform for multitenancy. It improves server stability, density, and security by isolating each tenant and giving them allocated server resources. This creates an environment that feels more like a virtual server than a shared hosting account. By doing so, CloudLinux OS reduces operating costs and churn rates, and increases profitability.

CloudLinux OS is designed for shared hosting providers. It isolates each customer into a separate “Lightweight Virtualized Environment” (LVE), which partitions, allocates, and limits server resources, like memory, CPU, and connections, for each tenant. This ensures that tenants cannot jeopardize the stability of your servers, causing all sites to slow down or even come to a halt. CloudLinux OS also “cages” tenants from one another to avoid security breaches. This way, unstable scripts or malware are not able to sprawl across your customer sites, causing severe harm.

Results you can expect

We work with thousands of hosting companies, and we see improvements in server performance, utilization, and margins across all of them!

3x

drop in reboots

6x

drop in customer suspensions

5%

drop in customer churn

70%

drop in tickets for performance issues

~80%

utilization of server resources

CloudLinux OS Features

Build from the ground to secure and control individual tenants in multi-tenant environment

Make Your Server Stable

Shield your servers from performance spikes and prevent slowdowns and downtimes by limiting and partitioning resources per user, thus reducing resource spikes and support costs.

LVE Manager

LVE manager gives you full control over CPU, IO, memory, number of processes, and concurrent connections per user. Limit abusers, provide good customers with what they need, and upsell at any time.

MySQL is one of the main causes of issues on a shared server. MySQL Governor monitors MySQL usage, and throttles abusers, preventing them from overloading the server and improving overall stability and performance.

Stability is the key to success in shared hosting – stable servers make both you and your customers happy. Stable servers reduce churn and allow you to increase density, and therefore magnify your profit. The CloudLinux OS stability features prevent
resource spikes and make your servers rock-solid stable, even in the most stressful situations.

The CloudLinux OS Lightweight Virtualized Environment is a kernel-level technology that isolates each tenant into their own environment and
provides them with the amount of resources (CPU, IO, memory, processes, etc.) that can be used – specific to each individual customer. If the tenant hits the limit, other users will not notice anything, because the offender is immediately throttled.
This eliminates resource spikes, server overloads, and angry phone calls from customers.

Make Your Server Secure

Isolate tenants in "cages" to increase security. Users only have access to safe files and their own processes, and cannot see other users on the server.

CageFS

CageFS uniquely encapsulates each customer, preventing users from seeing each other and viewing sensitive information. It prevents a large number of attacks, including most of the privilege escalation and information disclosure attacks.

In old PHP versions, including widely used 5.2, 5.3, and 5.4, vulnerabilities, even if discovered, are not patched by the PHP.net community. HardenedPHP fixes those vulnerabilities and secures old and unsupported versions.

Cleaning up a hacked server is a nightmare. Yet, defacement and hacked accounts is something hosters battle on a daily basis. Beyond taking your support team's time, it also tarnishes your company image and causes customers to leave in droves. The main
reason hacking is so easy on shared hosting servers is because Linux was never meant to be used by a large number of not vetted users. It is too easy for a hacker to obtain an account on your server (by using a stolen credit card and signing up or
by abusing some outdated script one of your customers has not updated for years). After that, a hacker has inside access to the server and can begin poking around, finding low hanging fruit and hacking your server.

CloudLinux OS stops that.
With our CageFS and SecureLinks technologies, users are virtualized to their own file systems, preventing any individual user from seeing any other users on the server.

Make Your Server Profitable

Maximize the profitability of your servers by increasing density, giving customers more choices, upselling customers to higher plans without having to move to another server, and reducing support costs.

LVE manager

Host more customers on one server by allocating server resources to allow for the highest density of tenants, with up to 80% of server utilization.

With PHP Selector your customers will have the flexibility to choose any PHP version they need, including 4.4, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, and 7.0. CloudLinux OS also ensures that PHP is updated fast, making sites more secure and customers happy.

The high level of stability, which CloudLinux OS provides, makes every server more efficient, and that allows you to multiply the number of customers on each server without any stress. By preventing resource spikes, you can drastically improve utilization
of your servers. Before CloudLinux OS, you couldn't utilize 20–30 % of your server without affecting stability, but now you can have up to 80 % of your server utilized at any given time. Profitability is also increased by the
high level of security CloudLinux OS provides. Highly secure servers allow your customers to enjoy safe shared hosting, which decreases support inquires.

By setting resource limits for each customer, you also create upsell opportunities
whenever a user hits their limit. When a user hits the limit, you can upsell them to higher level or better plan without moving them to another server. Furthermore, by creating hosting packages based on resource utilization and flexibility features,
like support of various PHP versions, you could completely change your pricing policy and save old customers while attracting new ones. As a result of this expanded offering, you could increase profits.

Make Your Server High-Performing

Per-tenant resource allocation and limits for CPU, IO, and memory reduces server loads. When paired with our performance-enhancing features, this guarantees you the fastest servers.

Mod_lsapi

Mod_lsapi is the fastest and most reliable way to serve PHP pages. It has a low memory footprint and understands PHP directives from .htaccess files.

MySQL is one of the main causes of issues on a shared server. MySQL Governor monitors MySQL usage, and throttles abusers, preventing them from overloading the server and improving overall stability and performance.

CloudLinux OS offers a set of powerful features that greatly optimize performance of your servers. For example, mod_lsapi is faster than any other way to serve PHP with Apache.

Stability

Stability content

Profitabiity

Profitabiity content

Perfomance

Perfomance content

Highly Compatible

Enjoy the increased stability of CloudLinux OS without sacrificing compatibility. It works with all major control panels and is compatible with most software commonly used with CentOS and RHEL.

Easy to Get Started

A single script converts existing servers without any customer configs or data changes. A CentOS-like interface makes you feel instantly at home. It is highly compatible and workswith all software commonly used with CentOS and RHEL.